Magic Extractor 1.3.1 — GUI path fixes and cleaner extraction

A patch release focused on path handling in the GUI and Inno Setup extraction.

Fixed

• Drag-and-drop in the GUI could corrupt the dropped file's path, which was the
  likely cause of intermittent "DIE detection failed" errors. Paths from the
  file dialogs are also normalized to the native Windows separator now.
• Inno Setup extraction now preserves the installer's folder layout and
  flattens it into the output directory, instead of the old flat extraction.
• Removed a spurious SyntaxWarning that could leak into the extraction log
  when inspecting .py files bundled inside third-party installers.

Updated

• Bundled innounp 2.70.1 → 2.71.0 (adds the ** filemask wildcard, supports
  Inno Setup up to 7.1.0).

New

• The GUI's About dialog now shows the app version.

Full Changelog: 1.2.0...1.3.1